Transverse dumping-grate.



0. D. HAVARD.

TRANSVERSE DUMPING GRATE.

APPLICATION FILED 11111.27, 191s.

Patented June 17, 1913.

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TRANSVERSE DUMPING GRATE.

APPLICATION FILED JAN.27, 1913.

Patented June 17, 1913.

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WITNESSES COLUMBIA PLANOGRAPH cu., WASHINGTON, n. c.

OLIVER D. HAVARD, OF SCRANTON, PENNSYLVANIA.

TRANSVERSE DUMPING-GRATE.

Specification of Letters Patent.

Patented June 17, 1913.

Application filed January 27, 1913. Serial No. 744,447.

T0 (466 wit-0m 2'25 may concern Be it known that I, OLIVER D. :HAVARD, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Transverse Dumping-Grates, of which the following is a specification.

My invention relates to grates for furnaces and the particular object of the invention is to provide a grate suitable for burning small sizes of anthracite coal. It has been definitely determined that in order to burn this fine coal successfully, it is necessary to restrict the air spaces in a grate and that these air spaces must be uniformly distributed over the entire grate area. In other words, there must be no openings substantially larger than others if'a uniform and satisfactory operation is to be obtained. A grate surface of this character cannot be provided by means of ordinary rocking bar grates having a large number of moving parts, because the inaccuracies of casting and fitting give rise to openings large as to be fatal to the best results. I have found that the best effect can be produced by means of stationary grates, as the air spaces can then be properly positioned and propertioned, but this arrangei'nentrenders cleanin of the grate difiicult.

in the present invention, while preserving all the advantages of a fixed grate, I have provided means by which it can be conveniently cleaned. Such means consists in the arrangement of a comparatively narrow, movable portion between two fixed portions of the grate, such movable portion comprising a plurality of transversely tilting sections. In practice, 1 limit such movable portion to about ten per cent. of the entire grate surface, and this suffices to provide ample space for dis-charging the ash. In order that my invention may be clearly understood, reference is had to the accompanying drawings, forming part of this specification, and in which,

Figure 1 is a plan view of a complete grate constructed in accordance with my invention; Fig. 2 is a transverse section on the line 22 of Fig. 1; Fig. 3 is a transverse section on the line 3-3 of Fig. 1; Fig. 4: is a longitudinal section taken somewhat to one side of the center; and, Fig. 5 is a sectional detail on an enlarged scale.

Referring to the drawings in detail, 1

made up of a plurality of designates the furnace wall which may be of brick or any suitable material, and 2, 2 indicate the feed door openings. As shown my improved grate comprises the front and rear fixed portions 3 and 4e, respectively, of comparatively large area, and the intermediate movable portion comprising the two sections 5 and 6.

Referring to Figs. 2 and 4:, it will be seen that each of the fixed sections 3 and 4: is

straight, flat, uniform bars 7, laid side by side, with their edges in contact substantially throughout their length. These bars are preferably provided on their surface with one or more longitudinal ribs 8, and are strengthened on their under sides by means of longitudinal truss ribs 9 and transverse brace ribs 10. The bars of the portion 3 are supported by means of cross beams 11 and 12, while the bars of portion 4. are supported at their ends by similar beams 13 and 14. The bars 7 as well as the movable sections 5 and 6 are all provided with a plurality of relatively small, uniformly distributed air holes 15, which are preferably of tapering form, as shown in Fig. 5. The cross beams 12 and 13 are spaced apart so as to receive between them the dumping sections 5 and 6. Each of these sect-ions is substantially of inverted U-shape in cross section, as clearly shown in Fig. 4c and comprises the trussshaped side members 16 and 17, connected by brace ribs 18. The upper edges of the beams 12 and 13 are preferably wedgeshaped, as shown in Fig. 4:, and the corresponding ends of the bars 7 are provided with J-shaped notches adapted to fit over the wedge-shaped edges of the beams.

Secured to and preferably formed integrally with the side members 16 and 1'? of each dumping section, are trunnions 20 and 21, which trunnions are jo-urnaled in openings in the beams 12 and 13. Extending between the lowermost portions of the side members 16 and 17 of the section 6, is a cross-pin 22, to the middle of which is pivotally secured an operating link 23. A similar pin 24 extends between the side members of the section 5, and its outer ends are pivotally connected to the corresponding ends of the pin 22 by means of a pair of links 25, disposed outside of the side members so as to avoid the braces 18. The link 23 extends through a suitable opening in the wall of the furnace and is pivotally connected with an operating crank 26, journaled at 27 in a bracket 28, and having rigidly secured thereto, a socket 29 into which the end of an operating lever can be inserted when dey sired. The end of the section 5, adjacent wall. In this manner, a substantially air tight j int is p l ds A fix d plat 32 serves to form a ght jo n w h the end of section 6., While th abut ing dg of he two seCtiQns slightly overlap, as indicated at 33.

It will be observed that the upper sur faces of all of the grate sections lie in the same plane, and that the entire grate is preferably slightly inclined from the front toward the rear. It will be understood that When the sections 5 and 6 are swung into the posi ion shown in dotted line i F gn open space between the fixed portions 3 and 4: is provided, and through this space the ashes and clinkers may be raked and discharged from both on and rear.

It will thus be seen that I have provided a y simple nst uction of gr te, whi h, while preserving substantially all of the advantages of a fixed grate, has the additional advantage of being easily cleaned, and it is thought that the great utility of Copies of this patent may be obtained. for five cents each, by addressing the the arrangement will be readily appreciated Without further discussion.

WVhat I claim is:

1. A grate comprising front and rears fixed portions, and an intermediate movable portion all lying in the same plane, said movable portion being made up of a plurality of laterally tilting sections.

2. A grate comprising front, intermedi- 4 ate, and rear portions, all lying in the same plane, said front and rear portions being fixed, and comparatively long, while said intermediate portion is movable, and comparatively short, said intermediate portion 4 comprising a plurality of pivotally mounted sections transversely tilting.

3. A grate comprising front and rear fixed portions of relatively large area, and an intermediate movable portion of relatively small area, all of said portions lying in the same plane said intermediate portion comprising a pair of pivoted transversely tilting sections, and means for simultaneously swinging both said sections on their 5 pivots. In testimony whereof I have affixed my signature, in presence of two witnesses.

OLIVER D. HAVARD. lVitnesses:

C, A, BATTENBERG, VIOLA Cornrnx.

Commissioner of Patents 

